RadiSys Company OverviewMARCH 2-3, 2009

BRIAN BRONSONCFO

HOLLY STEPHENSFINANCE & IR MANAGER

Safe Harbor

FORWARD-LOOKING STATEMENTSARE INCLUDED IN THIS PRESENTATION.Any statements in this presentation regarding future expectations for the business of RadiSys constitute forward-looking statements that involve a number of risks and uncertainties. We caution younot to place undue reliance on these statements. Factors that could cause actual results to differ materially from those in the forward-looking statements can be found in our SEC filings, including our 2007 Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q.

THIS PRESENTATION IS AS OF MARCH 2-3, 2009.The content of this presentation contains time-sensitive information that is accurate only as of the time hereof. RadiSysundertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company’s expectations.

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EMPLOYEES

660 EMPLOYEESWITH 240 IN R&D

Company Overview

HEADQUARTERS EXPERIENCE

20+ YEARS DEVELOPING EMBEDDED PRODUCTSHILLSBORO, OR

GLOBAL PRESENCE

CUSTOMERS & OPERATIONS IN NORTH AMERICA, EUROPE & ASIA

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What We Do

WE PROVIDE ADVANCED EMBEDDED SOLUTIONS & COMPLETE LIFECYCLE OWNERSHIP

Embedded Boards, Blades, Software, Systems & Turnkey PlatformsConcept, Design, Delivery, Sustaining & End of Life

THAT ENABLESOUR CUSTOMERS TO…

Get more products to marketGet products to market fasterRedeploy R&D to higher valueReduce product costs

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The Markets We Serve

COMMUNICATIONS NETWORKING80% OF SALES | 80% OF R&D

COMMERCIAL20% OF SALES | 20% OF R&D

WIRELESS INFRASTRUCTURE

ATCA

MEDIA SERVER

MEDICAL

TEST & MEASUREMENT

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Media Server Market Leader

RADISYS MEDIA SERVERS

APPLICATIONSConferencing, Messaging, Call Center, Voice Services, Interactive Voice Recognition Move from TDM to IP where IP media servers are requiredGlobal presence and global opportunities

Powerful, multi-service platforms for manipulating voice, video and images in real-time Highly standards based, extremely scalable and flexibleGross Margins of 60-70%

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Award Winning ATCA Products

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RADISYS ATCA PRODUCTSLeading 10G System -switching to handle high throughput applicationsPlatform software to manage shelf management, datapath software, blade/switch managementWide selection of ATCA blades optimized for target applicationsBest in class partners – CG Linux OS, HA Middleware, building block assets - silicon, chassis

APPLICATIONSIPTV, Voice Quality Enhancement (VQE), Radio Network Controller (RNC), Media Gateways -VoIP, IP Multimedia Subsystem (IMS), WiMax

Commercial Market Products

MEDICAL IMAGING SOLUTIONS

GRAPHICS COMPUTE PLATFORMSMobile, low power, small form factorApplications – Mobile security, patient monitoring, portable instruments, in-flight entertainment, gamingProducts – Computer on Module Express & Single Board Computers

High performance image processing, long life solutionsApplications – MRI, Ultrasound, CAT ScanProducts – Embedded Servers, Computer on Module Express

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Our Customers

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C O M M U N I C A T I O N S N E T W O R K I N G COMMERCIAL

Principle Competitors

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OURCUSTOMERS

PLATFORMPROVIDERS

BOARD PROVIDERS

Choose to keep development in-house and proprietary.

Global Operations

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Vancouver

HillsboroDes Moines

Boca Raton

Dublin Munich

Japan

Penang

Shanghai

Shenzhen

Research & Development Centers

Sales/ Support Sites

Internal / Contract Manufacturing

Leadership Team

Scott GroutPresident & CEO

Brian BronsonCFO

George ShenodaCTO

Anthony AmbroseVP / GMCommunications Networking Market

Wade ClowesVP / GMCommercial Market

Chris LepianeVP GlobalSales and Service

John MajorVP Global Operations

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Engineering Services

Hardware Only

ASPs $2-$4K

GM% in the 20s

Revenue Concentrated

US Centric

In-house Manufacturing

Technology Centric

FROM TO PROGRESS

Strategic Transformations

Product Company

Hardware, Software & Systems

ASPs $20-$30/$60K

ATCA 30%+, Media Server 60%+

Revenue Diversified

Global – Ops, R&D, Customers

Outsourced Manufacturing

Market Centric & Tech Enabled

75% Wins Standard Based

$100M ‘08 Next-Gen Com Rev

More ATCA Systems & Media Server Systems

GM% of 31.6% in Q408*

100+ New Customers

Diversified ’08 Revenues: 32% -NA, 37% - Europe, 31% - Asia

80% Outsourced Manufacturing

Product Marketing Team

*Represents non-GAAP results. A reconciliation of GAAP to Non-GAAP results is located on earnings releases filed on Form 8-K. 13

Strategic Results

MEANINGFUL NEW PRODUCT DEPLOYMENTS

SIGNIFICANT NEW PRODUCT REVENUE GROWTH

CONTINUED CUSTOMER DIVERSIFICATION

*Represents non-GAAP results. A reconciliation of GAAP to Non-GAAP results is located on earnings releases filed on Form 8-K. 14

New business won with ZTE in China for unified communications applications

Shipped embedded servers to two Tier 1 medical imaging customers

Next-generation communication revenue of over $100M in 2008

Design wins with over 100 new customers

New Tier 1 wireless networking customer reached Carrier approval to deploy with ATCA Platform

Record Media Server revenues with growth in NA, Europe, Asia in 2008

Record ATCA revenues in 2008 as customers move to deployment

Six new customers entered top 10 customer list in past year and half

Product Transformations

15*Represents Non-GAAP gross margins. A reconciliation of GAAP to Non-GAAP results is located on earnings releases filed on Form 8-K.

2007 2008E 2009E 2010E 2011E

PROJECTED REVENUES

LEGACY – Gross Margins 23-25%* NEW– Gross Margins 33-35%*

$49M$76M

EMEA37%

NA38%

APAC25%

EMEA37%

NA33%

APAC30%

$100M

EMEA34% NA

54%

AP2%

Q2 2003Q2 2007

Q3 2008

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Global Business Growth

Growing Revenue

RECORD REVENUE IN 2008

INCREASING REVENUE OFNEW, HIGHER VALUE PRODUCTS

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$203$246 $260

$292$325

$373

2003 2004 2005 2006 2007 2008

Revenue up 15% over 2007Record ATCA & Media Server Revenue

$100M of Revenue in 2008 from ATCA & Media Server Products Up from $36M in 2007

Improving Gross Margin

FAVORABLE PRODUCT MIX

IMPROVEDMANUFACTURING COSTS

18*A reconciliation of GAAP to Non-GAAP results is located on earnings releases filed on Form 8-K.

31.6%30.8%29.4%

27.8%26.6%

27.4%

25.3%

Q207 Q307 Q407 Q108 Q208 Q308 Q408

Revenue growth / mix of business moving to higher value products

Excess & obsolesce inventory charges down year over yearCost reductions

Cash Flow Generator

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OPERATING CASH FLOW

$18

$25

$32

$9

$20

$35

$25

2002 2003 2004 2005 2006 2007 2008

Generated cash flow from operating activities of between $10M and $35M a year since 2002Generated cash flow from operating activities of $35M in 2008Current cash flow break-even is around $63M - $65M depending on product mix

2008 Results & Outlook

REVENUE

29.9%, up 2.8 percentage points year over year

$373M, up 15% year over year

GROSS MARGIN*

*Represents non-GAAP results. A reconciliation of GAAP to Non-GAAP results is located on earnings releases filed on Form 8-K.** Per the Company's guidance on February 3, 2009. 20

5.6%, up 2.8 percentage points year over year

OPERATING INCOME*

EPS*

Operating cash flow of $35M, up 75% or $15M year over year

$12.5M or 49 cents, up $4.2M or 15 cents year over year

CASH FLOW

$74M of Cash and Equivalents at the end of 2008

CASH BALANCE

REVENUE $73M to $79M, lower wireless & softness in Commercial **

$0.05 to $0.11 **

EPS*

Q1 OUTLOOK2008 RESULTS

Increased uncertainty & projected softening in demand

Remain focused on core strategies, while monitoring expenses to continue to generate operating cash flow

Balance Sheet

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31-Dec-07 30-Sep-08 31-Dec-08ASSETS Cash & ST Investments $123 $83 $74 LT Investments - 57 51 Settlement Right (UBS) - - 11 Accounts Receivable 71 49 46 Inventory 23 31 29 Goodwill & Intangibles 106 91 20 Deferred Tax Assets 47 49 56 Other Assets 23 23 22 TOTAL ASSETS $393 $383 $309LIABILITIES & EQUITY Current Liabilities $72 $61 $59 ST Convertible Notes 98 37 - ST Line of Credit - UBS - - 40 LT Convertible Notes - 55 50 LT Line of Credit - SVB - 20 - Other Long-term Liab 3 3 3 Shareholders' Equity 220 207 157 TOTAL LIABILITIES & EQUITY $393 $383 $309

$ millions

Why Invest in RadiSys?

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Well positioned for growth in a transforming marketIndustry shift to merchant supplied embedded platforms

Selling new products with higher ASP’s, more value, more marginATCA, Media Servers, Imaging ServersNext-generation communication revenue of $100 million in 2008

Significant new wins and now rampingMany new customers in compelling applications

Meaningful financial progress Gross margin* from a low of 25% in ‘07 to over 31.6% in Q408Operating income* from 0% to 8% over past 5 quarters

Strong cash position and generating cash flowCash of $74 million as of end of 2008Operating cash flow of $34 million in 2008, with $11 million in Q408

*On a non-GAAP basis. A reconciliation of GAAP to Non-GAAP results is provided in quarterly earnings releases filed on Form 8-K.